Effect of Titanium Dioxide Modified Graphene on Mechanical Properties and Microstructure of Alkali-activated Slag Composites

被引：0
|
作者：
Guo S. [1 ,2 ]
Qiao X. [1 ]
Wan X. [1 ,2 ]
Zhao T. [1 ,2 ]
Nie R. [1 ]
Tan Z. [1 ]
Wang T. [1 ]
机构：
[1] School of Civil Engineering, Qingdao University of Technology, Qingdao, 266033, Shandong
[2] Cooperative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone, Qingdao University of Technology, Qingdao, 266033, Shandong
来源：
Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2019年 / 47卷 / 11期
关键词：
Alkali activated cement; Composite; Graphene; Mechanical properties; Microstructure; Slag; Titanium dioxide modified;
D O I：
10.14062/j.issn.0454-5648.2019.11.15
中图分类号：
学科分类号：
摘要：
Titanium dioxide modified graphene (TiO2-RGO) with a good dispersibility was prepared by an intercalation method, and it was incorporated into alkali-activated slag to prepare graphene-enhanced alkali-activated composites with different graphene mass fractions (i.e., 0, 0.01%, 0.02% and 0.03%). The mechanical properties and microstructure and the graphene enhancement were investigated. The results show that the bending and compressive strengths of the alkali-activated cement composites increase with the increase of the mass fraction of graphene. The bending toughness of the alkali-activated composite material with 0.03% graphene is increased by more than 80%, compared to the normal sample. The microstructure of graphene was characterized by scanning electron microscopy and X-ray diffraction. It is indicated that ductile graphene can fill the pores, increase the contact area with the matrix, and effectively improve the crack deflection and branching as well as the pull-out and anchoring of graphene. The alkali-activated composite has poor bending toughness and brittleness, but does not change the phase composition of the matrix. © 2019, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.
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页码：1635 / 1641
页数：6
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